Question

The mass of an electron is 9.11x10^-31 kg if its kinetic energy is 3×10^8 j then calculate its velocity

Answer 1

given that mass =9.11*10^-31
K.E.= 3*10^8
1/2mv²=3*10^8

putting values we get v=6/911*10^41
v=6*10^38(approx) m/s
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